They unlock the Earth’s treasury of hummingbirds.
Does it help or hurt the birds?

We were midway up the Andes mountains of Ecuador on a swing through one of the richest parts of the world for all kinds of birds, from toucans to tanagers to Andean Condors. Yet nothing came close to the treasury of hummingbirds. More than 130 species — the most found anywhere on Earth — fill the rainforests, fields and hills of northern Ecuador.